Improved maceffie foe wall-buildim and stump-extbaottng



i i @eine faire @stent-@fitta THOMAS S.` GREENMAN, 0F" MYSTIC BRIDGE, ASSIGNOR 4To GEORGE yVi".

PACKER, JR., 0F MYSTIG RIVER, CONNECTICUT..

Letters Patent 72,024, dated December" 10, 1.867'.

IMPROVED MACHINE FOR WALL-BUILDING AND STUMP-EXTRAGTINGn titte .Srlgehule rtfmh tu in there tttters utent mit mating pitt nf its same.

I TO ALL WHOM IT MAY CONCERN:

Be it known that I, Thrones S. GREENMAN, of Mystic Bridge, in the town of Stonington, 'county of New London, and State of Connecticut,have invented certain new and useful Improvements in Machines for Lifting Rocks, Pulling Stamps, Building Wall, and thelike; and I do herebvdeclare that the following is a full and exact description thereof. v

My invention relates to the construction of the truss-work or supporting-frame ofthe machine. The general construction and arrangement of the machine is similar to that described in the patent to George W. Packer, dated August 29, 1865; there being four wheels and a'connccting truss-frame adapted lto lifting and supporting the rock or stump, and allowing it to be swung andturned at proper elevation between the two pairs of wheels.

Confining attention entirely to the truss, I will proceed to describe what I consider the best means of carrying out my invention, reference being had to the accompanying drawings, which form apart of this speciiication.

Figure 1 is a side elevation.

Figure 2 an end elevation, and

Figure 3 a plan view of my machine.

Similar letters of reference indicate4 like parts in all' the figures. h

A A B B represent the inclined timbers, which form the triangular framing. The timber A rests on the forward axle, or rather on the bolster C, which is supported thereon. The timbers B'B rest` near the ends of the rear axle, and the three are united rmly at the apexof the triangular pyramid-thus foi-med. On each side of the timber A are xed cheeks or stout pieces, as indicated by a, the function of which will presently appear. .D D are straight or slightly-curved timbers, notched into the inclined timbers B B, into the cheeks a a, and firmly bolted thereto by bolts b, as indicated. E F are uprights, which support the extreme endso'i` the horizontal timbers D, andconnect them to their respective supports. G G are holding-down bolts, arranged to cross each other, as represented, and to hold-down the forward ends of the timbers D D. They are provided with adjustingnuts g, and their tension may be regulated to compensate for any looseness or shrinkingot the work. H H are holding-down bolts, which connect the rear ends of the timbers B B with the support or rear axle. I and J are inclined braces, of round iron or other suitable material, adapted tobear great tensile strain. They stand in inclined positions, as represented; the inclined braces I connecting the front bolster C to the timbers, at apoint a little in the rear of the cheeks a, and the inclined braces J connecting the rear axle with the timbers D, a little forward of the inclined.` timbers B= These are provided with adjusting-nuts, and their tension may be graduated as required to support the mechanism and give strength and stiffness tothe structure.

When my machine is subjected `toa severe. st rain,:in lifting, and carrying a heavy rock or other object, the load is thrown upon the apex 'of the triangular frame A B B, and the tendency ci' the lower portion of the framing to be extended'horizntally'is resisted by the beams D and their attachments. The peculiar arrangement of the material allows the employment of a straight or' nearly straight timber, D, while the base of the triangular frame is eii'ectually held against spreading by-the uprights E F, the holding-clown bolts G II, and the inclined braces I and J.' The arrangement has been tested, and found to operate 4sueessfully with heavy loads, while it allows a'larger stump, rock, or otherA object .to be swung and turned, and also allows the fore wheels of the machine to run Yunder the truss-work, so as to allow the machine to be turned around in a manner which would not be possible without the base of the triangular framing connected by.straight ties.

'lhe curved ties described in the patent of 'George W. Packer, before referred to, aresnceessful in practice, butare diicult to obtain 4inl like localities. Thel timber'required is too large and stiii. to be prepared inthe curved form, by artificial mcans,`without great expense, and it is, in some situations, impossible to`procure timber naturally so curved. My invention-'avoids vthese difficulties. y

The machine is liable to be subjected to very severe transverse as wellas vertical strains. There are periods when the whole force of a powerful team isexpended in pulling sidewise on the tongue and front axle of-tlxe machine. This subjects the entire framing to a severe twisting or racking strain. The diagonal position o!" the front holding-down bolts G Ggreatly strengthens 4the front portion of the truss-work to resist such strain, without very materially increasing-the weight or cost of the parts. i

I believe it also very highly conducive to the rigidity of the structure, and its ability to resist such torsional or'racking strain, to enlarge the horizontal timbers D D, enlarge the pyramidal framework A B B, and to bolt these parts firmly together, by making tie-rods, bolts, or braces G G II H I I .I J so that their length may be adjusted by nuts or equivalent means. I ain able to sovproportiontlie length that but very little strain is thrown on the fastenings, betweenthe horizontal timbers and thetriangular framework, in supporting the load. Y Consequently there is but little transverse strain thrown on the inclined timbers'A B B. In fact the fastening of D to the parts B B, and to the part A, as described, performs the double function of stiifening the machine laterally, and the steadying or supporting the pyramidal framing against displacements, when strained with `a heavy load.

Having new fully described myinventon, what I claim as new, and desire to secure by Letters Patent, is

as follows:

1.' I claim the within-described novel construction of trussfor a wall-building'machine, the same consisting in the pyramidalframingA B B, the horizontal'timbers D D, uprights E F, holding-down bolts GJ, and inclinedbraces I H, combined and arranged substantially as land for the purpose herein set forth. 1

f2..- I claim, in such truss, firmly securing the timbers D to the py'ramidal framing A B B, by enlarging and bolting, or equivalent fastenings, at the points of Contact, in addition to the truss-work before described, substantially as and for the purpose herein specified. v i

3, I claim the diagonal arrangement of the holding-down bolts G at the front of my truss, the same being arranged relatively to the timbers D, triangular frame A B B, and their several connections, substantially in the manner and for the purpose herein set forth. Y'

. In testimony whereof, I have hereunto set :ny-hand in the'presence of two subscribing witnesses.

THOS. S. GREENMAN.

Witnesses:

WM. C. DEY, C. C. LIVINGS. 

